WO1999040499A1 - Barre de regulateur de vitesse et procede de conduite d'une tondeuse automotrice susceptible de tourner sur place - Google Patents

Barre de regulateur de vitesse et procede de conduite d'une tondeuse automotrice susceptible de tourner sur place Download PDF

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Publication number
WO1999040499A1
WO1999040499A1 PCT/US1999/002404 US9902404W WO9940499A1 WO 1999040499 A1 WO1999040499 A1 WO 1999040499A1 US 9902404 W US9902404 W US 9902404W WO 9940499 A1 WO9940499 A1 WO 9940499A1
Authority
WO
WIPO (PCT)
Prior art keywords
lawn tractor
control lever
console
cruise bar
cruise
Prior art date
Application number
PCT/US1999/002404
Other languages
English (en)
Other versions
WO1999040499A9 (fr
Inventor
Jimmy N. Eavenson
Gerald Hobrath
Original Assignee
Eavenson Jimmy N
Gerald Hobrath
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eavenson Jimmy N, Gerald Hobrath filed Critical Eavenson Jimmy N
Priority to DE69911173T priority Critical patent/DE69911173T2/de
Priority to AU25821/99A priority patent/AU2582199A/en
Priority to EP99905723A priority patent/EP1053517B1/fr
Publication of WO1999040499A1 publication Critical patent/WO1999040499A1/fr
Publication of WO1999040499A9 publication Critical patent/WO1999040499A9/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
    • B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
    • B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
    • B62D11/10—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
    • B62D11/14—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
    • B62D11/18—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
    • B62D11/183—Control systems therefor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/04—Stops for limiting movement of members, e.g. adjustable stop
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/2063—Stops

Definitions

  • This invention pertains to the art of methods and apparatuses for use in lawn and garden care, and more specifically to methods and apparatuses for controlling the speed and direction of a zero turn lawn tractor.
  • a zero turn tractor may have two drive wheels, one on each side of the tractor, and two independent control levers. Each control lever controls the speed and the direction of one of the drive wheels. To make a zero radius turn it is necessary to drive one of the drive wheels in a first or forward direction while simultaneously driving the other drive wheel in a second or reverse direction. Such zero turn tractors have proven to be adequate for their intended purpose. Some problems, however, have been experienced.
  • Turfing is the damage done to the ground or turf when an operator too abruptly turns a zero turn tractor. Operators have a tendency when turning a zero turn tractor to "turn" the control levers much like a steering wheel is turned. In other words, operators have a tendency to pull one control handle backwards while pushing the other control handle forward. This pull/push motion may cause the inside drive wheel to slide across the turf thereby damaging the turf. What is needed is a way to minimize turfing.
  • Steering wheels of known lawn tractors actually provide at least two functions for the operator.
  • One function is the steering control.
  • the second function is that the steering wheel provides a resting surface to rest the operator's hands.
  • the operator's hands may not be rested on such control levers without the lawn tractor's speed and/or direction being inadvertently adjusted. Therefore, the operator's hands must be supported by the operator's arms and shoulders. This may prove to be tiring for the operator's arms, shoulders and back when the lawn tractor is driven for large amounts of time. What is needed is a way of utilizing independent control levers while still providing a means for resting the operators hands and thus his arms, shoulders and back.
  • the present invention provides methods and apparatuses for reducing these problems.
  • the difficulties inherent in the art are therefore overcome in a way that is simple and efficient while providing better and more advantageous overall results. Disclosure of the Invention
  • a lawn tractor includes a frame, driving means for use in driving the lawn tractor, a first drive wheel for use in driving the lawn tractor, a console that is operatively connected to the frame, a first control lever for use in controlling the speed and direction of the lawn tractor, and a cruise bar for use in limiting the motion of the first control lever.
  • the first control lever is operatively connected to the driving means and to the first drive wheel.
  • the first control lever is selectively moveable in a first direction.
  • the cruise bar limits the motion of the first control lever in the first direction.
  • the cruise bar is operatively connected to the console.
  • the lawn tractor may further comprise adjusting means for adjusting the position of the cruise bar.
  • the preferred adjusting means includes a first adjustment bolt for use in locking the cruise bar in position with respect to the console.
  • the first adjustment bolt is operatively received by a first opening in the cruise bar and a first slot in the console.
  • the first adjustment bolt is selectively slidable within the first slot of the console as the cruise bar is pivoted about its ends.
  • a method for driving a lawn tractor First, the operator's hands are rested on the cruise bar. Next, the operator squeezes the first control lever towards the cruise bar with a first hand and simultaneously squeezes the second lever towards the cruise bar with a second hand. When the first and second control levers contact the cruise bar, the speed of the lawn tractor is limited.
  • One advantage of the present invention is that the tendency for turfing is greatly reduced. This is true because the cruise bar makes it easy for the operator to turn the lawn tractor without the push/pull motion discussed above.
  • Another advantage of the present invention is that the cruise bar provides a better ergonomic design for a lawn tractor having control levers.
  • Another advantage of the present invention is that the top speed of the lawn tractor can be easily limited. Still another advantage of the present invention is that the position of the cruise bar can be easily adjusted.
  • FIGURE 1 is a perspective side view of a lawn tractor showing the cruise bar of this invention.
  • FIGURE 2 is a perspective side view of the console showing the first and second control levers, the cruise bar, and the handle.
  • FIGURE 3 is a back view of the console taken along the line 3-3 of
  • FIGURE 2 showing the first and second leg members of the cruise bar.
  • FIGURE 4 is a side view of the console taken along the line 4-4 of
  • FIGURE 2 showing how an operator's hand is positioned in order to squeeze the control lever toward the cruise bar.
  • FIGURE 5 is a perspective side view of the console shown with the cruise bar removed and showing the first slot and first hole on the first side of the console. Description of the Preferred Embodiment
  • FIGURE 1 shows a lawn tractor 10 that is equipped with the present invention, a cruise bar 40.
  • This preferred embodiment is directed to a lawn tractor but the invention is applicable to other vehicles and other applications as well.
  • the lawn tractor 10 has an operator seat 11 and a console 13 both operatively mounted to a frame 18.
  • the lawn tractor may also have a mower deck 12 suspended from the frame 18 for use in cutting vegetation as is commonly known in the art.
  • a driving means 14 is also mounted to the frame 18.
  • the driving means 14 can be of any type currently used in the art such as an engine and provides rotation for one or more drive wheels 16 as is commonly known in the art.
  • the preferred embodiment shown in FIGURE 1 includes first and second drive wheels 16a, 16b.
  • the embodiment should is a lawn tractor 10 having zero radius turning capabilities.
  • the lawn tractor 10 is a zero turn tractor.
  • the first and second drive wheels 16a, 16b are independently controlled for speed and direction of rotation by first and second control levers 15, 17 respectively.
  • the operative connections between the first and second control levers 15, 17, the driving means 14, and the first and second drive wheels 16a, 16b can be of any type currently known in the art and therefore will not be discussed further.
  • first control lever 15 When the first control lever 15 is moved in a first direction 36 it causes the first drive wheel 16a to rotate in a first direction (counterclockwise as shown in FIGURE 1) to move the lawn tractor in the first direction 36.
  • first control lever 15 When the first control lever 15 is moved by the operator in a second direction 37, it causes the first drive wheel 16 to rotate in a second direction (clockwise as shown in FIGURE 1) to move the lawn tractor 10 in the second direction 37.
  • the operator releases the first control lever 15 it automatically moves to a neutral position thereby ceasing to drive the first drive wheel 16a.
  • the second control lever 17 is similarly operated with regard to the second drive wheel 16b.
  • the console 13 has first and second sides 20, 21 and a first end 19. It should be noted that the first and second control levers 15, 17 extend through the first end 19 of the console 13 though a console 13 is not required for this invention.
  • the first and second sides 20, 21 of the console 13 have first and second slots 22, 23 and first and second holes 24, 25 respectively for use in connecting to the cruise bar 40 as will be discussed further below.
  • the lawn tractor 10 may also have a handle 32 attached to the console 13 that extends upward from the first end 19 of the console 13.
  • the handle 32 is not required for this invention but can be used to limit the position of the cruise bar 40 as will be discussed further below.
  • the cruise bar 40 can be of any size and shape chosen with sound engineering judgement.
  • the cruise bar 40 is U shaped with a cross member 41 connected to first and second leg members 42, 43.
  • the cruise bar 40 is connected to the first and second sides of the console 20, 21 through the first and second ends 46, 47 of the first and second leg members 42, 43.
  • the cruise bar 40 is positioned laterally spaced from the first and second control levers 15, 17 as shown in the FIGURES thereby providing a limit to the motion of the first and second control levers 15, 17 in the first direction 36.
  • the cruise bar 40 could be mounted on the opposite side of the first and second control levers 15, 17 thereby limiting the motion of the first and second control levers 15, 17 in the second direction 37.
  • two cruise bars could be used - the first cruise bar limiting the motion of the first and second control levers 15, 17 in the first direction 36 and the second cruise bar limiting the motion of the first and second control levers 15, 17 in the second direction 37.
  • the lawn tractor 10 in this preferred embodiment also has adjusting means 50 for adjusting the position of the cruise bar 40.
  • the first and second ends 46, 47 of the cruise bar 40 are pivotably attached to the first and second sides 20, 21 of the console 13 such as by placing pivot bolts 39 through the first and second ends 46, 47 and through the first and second holes 24, 25 of the console 13.
  • the adjusting means 50 may include first and second adjustment bolts 52, 53 that are received within first and second openings 44, 45 in the first and second leg members 42, 43 as well as in the first and second slots 22, 23 in the console 13.
  • the first and second adjustment bolts 52, 53 can be manually tightened and loosened.
  • first and second adjustment bolts 52, 53 can be selectively tightened thereby locking the cruise bar 40 in position and selectively loosened thereby permitting the cruise bar 40 to be pivoted about the pivot bolts 49. It should also be noted that only one adjustment bolt is required for this invention.
  • this invention provides an ergonomic benefit as the operator's hands 28 can be rested on the cruise bar 40. This minimizes potential strain and tiredness in the operator's arms, shoulders and back (not shown) that may occur without a cruise bar 40 as discussed above. In fact, before operating the lawn tractor 10, the operator may rest his hands 28 entirely on the cruise bar 40.
  • the operator squeezes the first control lever 15 towards the cruise bar 40 with one hand 28 while simultaneously squeezing the second control lever 17 toward the cruise bar 40 with the other hand 28.
  • This motion of the first and second control levers 15, 17 causes the first and second drive wheels 16a, 16b to rotate such that the lawn tractor 10 moves in the first direction 36.
  • FIGURE 1 shows that the first control lever 15 is laterally spaced a first distance Dl from the cruise bar 40 and that the second control lever 17 is spaced a second distance D2 from the cruise bar 40.
  • first distance Dl must be less than the second distance D2. This causes the first drive wheel 16a to rotate at a faster speed that the second drive wheel 16b and therefore causes the lawn tractor to turn in the third direction 38.
  • the second control lever 17 may have any one of three general positions with respect to the first control lever
  • the first possible position for the second control lever 17 is that it may be positioned toward the first direction 36. In this case both the first and second drive wheels 16a, 16b continue to drive the lawn tractor in the first direction 36. This is possible as long as the second distance D2 is greater than first distance Dl.
  • the second possible position for the second control lever 17 is that it may be positioned in a neutral position as discussed above. In this case it is only necessary for the operator to release the second control lever 17 (it will automatically return to the neutral position) and the lawn tractor 10 will turn in the third direction 38. In this way the problem of turfing, described above, can be easily avoided.
  • the third possible position for the second control lever 17 is that it may be positioned toward the second direction 37. In other words, the second drive wheel 16b will be rotated in a direction opposite to that of the first drive wheel 16a. This is the position required to obtain zero radius turning capabilities.
  • the first control lever 15 may have any one of the three general positions with respect to the second control lever 17 mentioned above for the second control lever 17.
  • the cruise bar 40 can be used to limit the top speed of the lawn tractor 10. This is true because as shown best in FIGURE 4, as the first and second control levers 15, 17 are moved in the first direction 36 they eventually contact the cruise bar 40 where their motion is stopped. This is a very convenient use of the cruise bar 40 for the operator.
  • the lawn tractor 10, for example may have a top speed of 10 miles per hour. It may be desirable, however, to limit the top operating speed to, for example, 6 miles per hour. Possible reasons for this limit may include an inexperienced operator, hilly terrain, personal preference, etc. By adjusting the position of the cruise bar 40, the top speed can be varied.
  • an adjustment in the first direction 36 would increase the top speed limit of the lawn tractor 10 and an adjustment in the second direction 37 would decrease the top speed limit.
  • the handle 32 can be used to limit the adjustable range of the cruise bar 40 in the first direction 36. In other words, the cruise bar 40 cannot be adjusted in the first direction 36 beyond the handle 32.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Harvester Elements (AREA)
  • Guiding Agricultural Machines (AREA)

Abstract

L'invention concerne une barre de régulateur (40) de vitesse utilisé avec une tondeuse à automotrice (10). Cette tondeuse comprend un châssis (18), un moyen d'entraînement (14) utilisé pour conduire la tondeuse automotrice (10), une première roue motrice (16a) utilisée pour entraîner ladite tondeuse (10), une console (13) reliée de manière fonctionnelle au châssis (18) et un premier levier de commande (15) utilisé pour contrôler la vitesse et la direction de la tondeuse. La barre de régulateur (40) de vitesse est utilisée pour limiter le déplacement du premier levier de commande (15). Le premier levier de commande (15) est relié de manière fonctionnelle au moyen d'entraînement (14) et à la première roue motrice (16a). Le premier levier de commande (15) se déplace de manière sélective dans une première direction (36). La barre de régulateur (40) de vitesse limite le déplacement du premier levier de commande (15) dans la première direction (36) et est reliée de manière fonctionnelle à la console (13). La barre du régulateur (40) de vitesse peut être réglée par rapport au premier levier de commande (15), ce qui fournit un procédé de limitation de la vitesse de pointe de la tondeuse automotrice (10).
PCT/US1999/002404 1998-02-04 1999-02-04 Barre de regulateur de vitesse et procede de conduite d'une tondeuse automotrice susceptible de tourner sur place WO1999040499A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE69911173T DE69911173T2 (de) 1998-02-04 1999-02-04 Wendekontrollsystem für rasentraktor
AU25821/99A AU2582199A (en) 1998-02-04 1999-02-04 Cruise bar and method of driving a zero turn lawn tractor
EP99905723A EP1053517B1 (fr) 1998-02-04 1999-02-04 Barre de regulateur de vitesse et procede de conduite d'une tondeuse automotrice susceptible de tourner sur place

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/018,674 US6070690A (en) 1998-02-04 1998-02-04 Cruise bar and method of driving a zero turn lawn tractor
US09/018,674 1998-02-04

Publications (2)

Publication Number Publication Date
WO1999040499A1 true WO1999040499A1 (fr) 1999-08-12
WO1999040499A9 WO1999040499A9 (fr) 1999-10-21

Family

ID=21789195

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/002404 WO1999040499A1 (fr) 1998-02-04 1999-02-04 Barre de regulateur de vitesse et procede de conduite d'une tondeuse automotrice susceptible de tourner sur place

Country Status (5)

Country Link
US (1) US6070690A (fr)
EP (1) EP1053517B1 (fr)
AU (1) AU2582199A (fr)
DE (1) DE69911173T2 (fr)
WO (1) WO1999040499A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6312354B1 (en) 1999-01-22 2001-11-06 Kanzaki Kokyukoki Mfg. Co., Ltd. Integral hydrostatic transaxle apparatus for driving and steering
US6397966B1 (en) 1999-01-22 2002-06-04 Kanzaki Kokyukoki, Mfg. Co., Ltd. Vehicle improved in steering
US6447419B1 (en) 1998-07-08 2002-09-10 Kanzaki Kokyukoki Mfg. Co., Ltd. Axle driving apparatus
US7426976B2 (en) 2007-01-31 2008-09-23 Edlin's Enterprises, Inc. Lawn mower steering control adapter
US9185843B2 (en) 2013-11-15 2015-11-17 Honda Motor Co., Ltd. Variable speed control systems and methods for walk behind working machine
US9470305B2 (en) 2014-01-24 2016-10-18 Honda Motor Co., Ltd. Variable speed control systems and methods for walk-behind working machines

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141947A (en) * 1998-06-05 2000-11-07 Mtd Products Inc Dynamic drive and brake system
US6868657B2 (en) 2002-05-15 2005-03-22 Deere & Company Mowing machines with ergonomic hand control levers
US7549500B2 (en) * 2005-09-08 2009-06-23 Vermeer Manufacturing Company Apparatus for control of a mobile machine
WO2014149737A1 (fr) 2013-03-15 2014-09-25 Mtd Products Inc Système de frein de stationnement pour une tondeuse à rayon de virage nul commandée par des barres de sécurité individuelle
US11046564B2 (en) 2015-11-09 2021-06-29 Crown Equipment Corporation Order picker materials handling vehicle with improved downward visibility when driving elevated
CA3181503A1 (fr) 2020-06-05 2021-12-09 Craig Rekow Systeme de commande d'operateur pour un vehicule de manutention de materiaux

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1458013A (en) * 1921-03-23 1923-06-05 Tampier Rene Jean Camille Operating handle for control or other mechanism
EP0443828A1 (fr) * 1990-02-21 1991-08-28 J.C. Bamford Excavators Limited Véhicule à direction par dérapage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5181370A (en) * 1991-04-05 1993-01-26 Nicholas Simone Cutting deck-mounted auxiliary operator control handle transformer unit and method for converting walk behind mid-size rotary mower into riding mower
JP2963628B2 (ja) * 1994-11-09 1999-10-18 株式会社クボタ 乗用芝刈機
US5830313A (en) * 1994-12-12 1998-11-03 Marcor Management, Inc. Self-propelled floor covering scraper machine
JPH09252625A (ja) * 1996-03-22 1997-09-30 Kubota Corp モーア

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1458013A (en) * 1921-03-23 1923-06-05 Tampier Rene Jean Camille Operating handle for control or other mechanism
EP0443828A1 (fr) * 1990-02-21 1991-08-28 J.C. Bamford Excavators Limited Véhicule à direction par dérapage

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6447419B1 (en) 1998-07-08 2002-09-10 Kanzaki Kokyukoki Mfg. Co., Ltd. Axle driving apparatus
US6312354B1 (en) 1999-01-22 2001-11-06 Kanzaki Kokyukoki Mfg. Co., Ltd. Integral hydrostatic transaxle apparatus for driving and steering
US6397966B1 (en) 1999-01-22 2002-06-04 Kanzaki Kokyukoki, Mfg. Co., Ltd. Vehicle improved in steering
US7426976B2 (en) 2007-01-31 2008-09-23 Edlin's Enterprises, Inc. Lawn mower steering control adapter
US9185843B2 (en) 2013-11-15 2015-11-17 Honda Motor Co., Ltd. Variable speed control systems and methods for walk behind working machine
US9470305B2 (en) 2014-01-24 2016-10-18 Honda Motor Co., Ltd. Variable speed control systems and methods for walk-behind working machines

Also Published As

Publication number Publication date
DE69911173T2 (de) 2004-06-17
DE69911173D1 (de) 2003-10-16
US6070690A (en) 2000-06-06
WO1999040499A9 (fr) 1999-10-21
AU2582199A (en) 1999-08-23
EP1053517B1 (fr) 2003-09-10
EP1053517A1 (fr) 2000-11-22

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